CN204514558U - A kind of tube bundle heat exchanger quick leak-checking instrument - Google Patents

Abstract

The utility model relates to a quick leak detection tool for tube bundle heat exchangers, which belongs to the technical field of maintenance equipment for tube bundle heat exchangers and is used for leak detection of tube bundle heat exchangers of large-scale air separation system equipment. The technical solution is: the fixed nut, the expansion rubber ring and the compression nut are respectively set on the fixed bolt and the hollow bolt in turn, one end of the connecting hose is connected with the center hole of the hollow bolt, and the other end is connected with the detection air source , Install a pressure gauge and a shut-off valve in the connecting hose. The fixing bolts and hollow bolts are respectively inserted into the two ends of the tested tube bundle, and the expanded rubber ring will be blocked by the tested tube bundle, and the gas is input into the tube bundle through the connecting hose, and the leakage of the tube bundle can be detected by observing the pressure gauge. The utility model quickly and accurately detects which tube bundle is leaking, avoids the overall replacement of a new heat exchanger, and reduces maintenance time and maintenance personnel. The utility model solves the detection problem after the tube bundle heat exchanger is damaged, ensures the continuity of production and improves the economic benefit of the enterprise.

Description

A Quick Leak Detection Tool for Tube Bundle Heat Exchanger

technical field

The utility model relates to a maintenance tool for rapid leak detection of a tube bundle heat exchanger, which belongs to the technical field of maintenance equipment for tube bundle heat exchangers.

Background technique

Tube bundle heat exchanger is an important equipment supporting various mechanical equipment. During use, the heat generated during the operation of mechanical equipment needs to be taken away by cooling water after heat exchange in the heat exchanger. Since the heat exchanger is subjected to long-term erosion and corrosion by various media, the heat exchange in the heat exchanger The tube bundle will be damaged, and the damage of the heat exchanger tube bundle will lead to a decrease in heat exchange effect or damage to other process equipment. Damage to the supercharger heat exchanger of the air separation system equipment will cause moisture to enter the air separation tower, resulting in channel ice blockage, and in severe cases, the air separation system will stop production. It is difficult to maintain the tube bundle heat exchanger after it is damaged. Since the tube bundle heat exchanger has many heat exchange tubes, the inner diameter of the heat exchange tube is generally 10-18mm. Return the heat exchanger to the factory for repair. Important air separation equipment generally has heat exchanger reserves, the purpose is to prevent the air separation system from shutting down after the heat exchanger is damaged. Heat exchangers for air separation plants are expensive, ranging from hundreds of thousands to more than 1 million yuan each, and the reserves of heat exchangers seriously occupy the company's funds. So far, the problem of overhauling the damaged tube-bundle heat exchangers of air separation system equipment has not been effectively solved, and it has become a chronic problem that restricts the normal operation of the air separation system and needs to be resolved urgently.

Utility model content

The technical problem to be solved by the utility model is to provide a quick leak detection tool for tube bundle heat exchangers, which can perform online leak detection for tube bundle heat exchangers, avoid replacing the entire heat exchanger, reduce maintenance time, and improve economic benefits.

The technical scheme that solves the above-mentioned technical problem is:

A rapid leak detection tool for a tube bundle heat exchanger, which consists of a plugging part and a pressing part. The blocking part includes fixing bolts, fixing nuts, compression nuts, and expansion rubber rings. Compression nuts, expansion rubber rings, connecting hoses, pressure gauges, stop valves, fixing nuts, expansion rubber rings and compression nuts of the blocking part and pressing part are respectively set on the fixing bolts and hollow bolts in sequence, and the compression nuts Located at one end of the nut close to the fixing bolt and hollow bolt, the outer diameter of the fixing nut is smaller than the inner diameter of the tube bundle heat exchanger, the outer diameter of the expansion rubber ring matches the inner diameter of the tube bundle heat exchanger, and the connecting hose One end is connected to the central hole of the hollow bolt of the pressing part, the other end of the connecting hose is connected to the detection air source, and a pressure gauge and a stop valve are installed in the connecting hose.

In the above quick leak detection tool for tube bundle heat exchangers, there is a gasket between the fixed nut and the expansion rubber ring, and a gasket between the compression nut and the expansion rubber ring, and the outer diameter of the gasket is smaller than that of the tube bundle heat exchanger. Tube bundle inner diameter.

In the above-mentioned quick leak detection tool for tube bundle heat exchangers, the front end of the connecting hose has a hard plug or a threaded plug, the rear end of the center hole of the hollow bolt is a socket or a threaded hole, and the hard plug or threaded plug of the connecting hose is The plug is mated and connected with the socket or the threaded hole at the rear end of the central hole of the hollow bolt.

The beneficial effects of the utility model are:

The plugging part and pressing part of the utility model are respectively inserted into the two ends of the detected tube bundle, and the expansion rubber ring will be blocked by the detected tube bundle by tightening the compression nut, and the gas is input into the tube bundle through the connecting hose, and the pressure gauge can be observed. Check the tube bundle for leaks. The utility model can check the tube bundles one by one, quickly and accurately detect which tube bundle leaks, avoids the overall replacement of a new heat exchanger, reduces maintenance time and maintenance personnel, reduces labor intensity, and saves maintenance costs. The utility model solves the long-term problem of detecting the damaged tube bundle heat exchanger of the air separation system equipment, ensures the continuity of production and improves the economic benefit of the enterprise.

Description of drawings

Fig. 1 is the structural representation of the utility model. the

The marks in the figure are as follows: tube bundle heat exchanger 1, tube bundle 2, fixing bolt 3, fixing nut 4, compression nut 5, expansion rubber ring 6, hollow bolt 7, gasket 8, connecting hose 9, pressure gauge 10 , Stop valve 11.

Detailed ways

The utility model is composed of a blocking part and a pressing part.

As shown in the figure, the blocking part includes a fixing bolt 3 , a fixing nut 4 , a compression nut 5 , an expansion rubber ring 6 and a gasket 8 . The fixing nut 3, the expansion rubber ring 6 and the compression nut 5 of the plugging part are set on the fixing bolt 3 in sequence, the compression nut 5 is located at one end of the nut close to the fixing bolt 3, the fixing nut 4, the compression nut 5 and the expansion rubber Spacers 8 are arranged between the rings 6 .

As shown in the figure, the pressing part includes a hollow bolt 7, a fixing nut 4, a compression nut 5, an expansion rubber ring 6, a gasket 8, a connecting hose 9, a pressure gauge 10, and a shut-off valve 11. The fixing nut 3, expansion rubber ring 6 and compression nut 5 of the pressing part are set on the hollow bolt 7 in sequence, the compression nut 5 is located at the end of the nut close to the hollow bolt 7, the fixing nut 4, the compression nut 5 and the expansion Gasket 8 is arranged between rubber ring 6. One end of the connecting hose 9 is connected to the center hole of the hollow bolt 7, and the other end of the connecting hose 9 is connected to the detection gas source. A pressure gauge 10 and a shut-off valve 11 are installed in the connecting hose 9.

As shown in the figure, the outer diameter of the fixing nut 4 of the blocking part and the pressing part is smaller than the inner diameter of the tube bundle 2 of the tube bundle heat exchanger 1, and the outer diameter of the expansion rubber ring 6 matches the inner diameter of the tube bundle 2 of the tube bundle heat exchanger 1, The outer diameter of the gasket 8 is smaller than the inner diameter of the tube bundle 3 of the tube bundle heat exchanger.

The figure shows that the front end of the connecting hose 9 has a hard plug or a threaded plug, and the rear end of the central hole of the hollow bolt 7 is a jack or a threaded hole. The hard plug or threaded plug of the connecting hose 9 is connected to the hollow bolt 7. The socket or threaded hole at the rear end of the center hole is matched and connected, and the plug is made of metal material or plastic material.

The use process of the present utility model is as follows:

Insert the fixing bolts 3 and the hollow bolts 7 of the blocking part and the pressing part together with the fixing nuts 4 and the expansion rubber rings 6 fitted thereto into the two ends of the tested tube bundle 2 of the tube bundle heat exchanger 1 .

Tighten the compression nuts 5 of the blocking part and the pressing part, so that the expansion rubber ring 6 is squeezed and expanded, and the expansion rubber ring 6 will seal the two ends of the detected tube bundle 2 tightly.

Plug one end of the connecting hose 9 into the center hole of the hollow bolt 7, and connect the other end of the connecting hose 9 to the detection gas source.

Connect the detection gas source, open the stop valve 11, the test gas enters the tube bundle 2 through the connecting hose 9, observe the pressure gauge 10, and close the stop valve 11 after reaching the specified pressure.

Observe the change of the pressure gauge 10. If the pressure gauge 10 shows that the pressure remains unchanged within 10 seconds, then it is determined that the tube bundle 2 is not leaking;

After one tube bundle 2 is inspected, the next tube bundle 2 is inspected until all tube bundles 2 of the tube bundle heat exchanger 1 are inspected.

If the leaked tube bundle 2 is replaced, or both ends of the damaged tube bundle 2 are blocked, the tube bundle heat exchanger 1 can continue to be used for future replacement or maintenance.

In one embodiment of the utility model, the tube bundle heat exchanger was found to be leaking during operation, and the system was shut down because there was no spare heat exchanger. If you wait for a new cooler to arrive and replace it, you need to wait at least 60 days. Using the quick leak detection tool of the utility model instead, the detection of the heat exchanger and the treatment of the leaking tube bundles have been completed in 10 hours in total, saving 1.35 million yuan in spare parts for the new heat exchanger.

Claims (3)

1. a tube bundle heat exchanger quick leak-checking instrument, it is characterized in that: it is by occluding member and suppress part and form, occluding member comprises set bolt (3), hold-down nut (4), gland nut (5), expanded rubber circle (6), suppress part and comprise hollow bolt (7), hold-down nut (4), gland nut (5), expanded rubber circle (6), connecting hose (9), tensimeter (10), stop valve (11), occluding member and the hold-down nut (4) suppressing part, expanded rubber circle (6) and gland nut (5) are sleeved on set bolt (3) and hollow bolt (7) respectively successively, gland nut (5) is positioned at the nut one end near set bolt (3) and hollow bolt (7), the external diameter of hold-down nut (4) is less than tube bank (2) internal diameter of tube bundle heat exchanger (1), the external diameter of expanded rubber circle (6) and tube bank (2) internal diameter of tube bundle heat exchanger (1) match, one end of connecting hose (9) is connected with the center pit of the hollow bolt (7) suppressing part, the other end of connecting hose (9) is connected with detection source of the gas, setting pressure table (10) and stop valve (11) in connecting hose (9).

2. tube bundle heat exchanger quick leak-checking instrument according to claim 1, it is characterized in that: between described hold-down nut (4) and expanded rubber circle (6), have pad (8), have pad (8) between gland nut (5) and expanded rubber circle (6), the external diameter of pad (8) is less than tube bank (2) internal diameter of tube bundle heat exchanger (1).

3. tube bundle heat exchanger quick leak-checking instrument according to claim 1 and 2, it is characterized in that: there are hard plug or threaded pin in the front end of described connecting hose (9), the center pit rear end of hollow bolt (7) is jack or threaded hole, and the jack of the hard plug of connecting hose (9) or threaded pin and the center pit rear end of hollow bolt (7) or threaded hole mate and be connected.